package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import io.swagger.models.auth.In;
import lombok.extern.slf4j.Slf4j;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.apache.commons.lang.StringUtils;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @author yangLiHua
 * @version 1.0
 * @DATE 2023-11-24 17:18:27
 */
@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;


    @Autowired
    private UserMapper userMapper;


    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 根据时间区域统计营业额
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO getTurnover(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dataList = new ArrayList<>();
        dataList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);//日期计算，获取指定日期后1天的日期
            dataList.add(begin);
        }

        ArrayList<Double> turnoverList = new ArrayList<>();
        for (LocalDate data : dataList) {
            LocalDateTime beginTime = LocalDateTime.of(data, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(data, LocalTime.MAX);
            Map map = new HashMap<>();
            map.put("status", Orders.COMPLETED);
            map.put("begin",beginTime);
            map.put("end",endTime);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null ? 0.0 : turnover;
            turnoverList.add(turnover);
        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dataList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * 根据时间区域统计用户数量
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO getUserStatics(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> dataList = new ArrayList<>();
        dataList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dataList.add(begin);
        }

        List<Integer> newUserList = new ArrayList<>(); // 新增用户数量
        List<Integer> totalUserList = new ArrayList<>(); // 总用户数量

        for (LocalDate localDate : dataList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            // 新增的用户
            Integer newUser = getUserCount(beginTime,endTime);
            // 总的用户量
            Integer totalUser = getUserCount(null,endTime);

            newUserList.add(newUser);
            totalUserList.add(totalUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dataList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }


    /**
     * 根据时间区间统计用户数量
     * @param beginTime
     * @param endTime
     * @return
     */
    private Integer getUserCount(LocalDateTime beginTime,LocalDateTime endTime){
        Map map = new HashMap();
        map.put("begin",beginTime);
        map.put("end",endTime);
        return userMapper.countByMap(map);
    }

    /**
     * 根据时间区域统计订单数量
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatics(LocalDate begin, LocalDate end) {
        List<LocalDate> dataList = new ArrayList<>();
        dataList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dataList.add(begin);
        }

        // 每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
        // 每天有效订单数集合
        List<Integer> validOrderCountList = new ArrayList<>();

        for (LocalDate date : dataList) {
            LocalDateTime beginTime = LocalDateTime.of(date,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date,LocalTime.MAX);
            //查询每天的总订单数（SELECT count(id) FROM orders WHERE order_time > ? AND order_time < ?）
            Integer orderCount = getOrderCount(beginTime,endTime,null);
            // 查询每天的有效订单数（SELECT count(id) FROM orders WHERE order_time > ? AND order_time < ? and `status` = ?）
            Integer validOrderCount = getOrderCount(beginTime,endTime,Orders.COMPLETED);

            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);
        }

        // 时间区域内的总订单
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        // 时间区域内总有效订单
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        // 订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount!=0){
            orderCompletionRate = validOrderCount.doubleValue() / totalOrderCount;
        }

        return OrderReportVO.builder()
                .dateList(StringUtils.join(dataList,","))
                .orderCountList(StringUtils.join(orderCountList,","))
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据时间区间统计指定状态的订单数量
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime,LocalDateTime endTime,Integer status){
        Map map = new HashMap<>();
        map.put("status",status);
        map.put("begin",beginTime);
        map.put("end",endTime);
        return orderMapper.countByMap(map);
    }

    /**
     * 查询指定时间区间内的销量排名top10
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSaleTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin,LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end,LocalTime.MAX);
        List<GoodsSalesDTO> goodsSalesDTOList = orderMapper.getSaleTop10(beginTime,endTime);
        String nameList = StringUtils.join(goodsSalesDTOList.stream().
                map(GoodsSalesDTO::getName).collect(Collectors.toList()), ",");
        String bumberList = StringUtils.join(goodsSalesDTOList.stream().
                map(GoodsSalesDTO::getNumber).collect(Collectors.toList()), ",");

        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(nameList)
                .build();
    }

    /**
     * 导出近30天的运营数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);

        // 查询概览运营数据，提供excel模板文件
        BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(begin, LocalTime.MIN),
                LocalDateTime.of(end, LocalTime.MAX));
        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            // 基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook excel = new XSSFWorkbook(inputStream);
            // 获得excel文件中的sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue(begin+"至"+end);
            // 获得第四行
            XSSFRow row = sheet.getRow(3);
            // 获取单元格
            row.getCell(2).setCellValue(businessData.getTurnover());
            row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessData.getNewUsers());
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessData.getValidOrderCount());
            row.getCell(4).setCellValue(businessData.getUnitPrice());

            for(int i = 0;i < 30;i++){
                LocalDate date = begin.plusDays(i);
                // 准备明细数据
                workspaceService.getBusinessData(LocalDateTime.of(date,LocalTime.MIN),
                        LocalDateTime.of(date,LocalTime.MAX));
                row = sheet.getRow(7+i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }
            // 通过输出流将文件下载到客户端浏览器中
            ServletOutputStream out = response.getOutputStream();
            excel.close();

            out.flush();
            out.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
